Beagle Channel (Spanish: Canal del Beagle; Yahgan: Onašaga) is a strait in the Tierra del Fuego Archipelago, on the extreme southern tip of South America between Chile and Argentina. The channel separates the larger main island of Isla Grande de Tierra del Fuego from various smaller islands including the islands of Picton, Lennox and Nueva; Navarino; Hoste; Londonderry; and . The channel's eastern area forms part of the border between Chile and Argentina and the western area is entirely within Chile.